Journal
FOOD CONTROL
Volume 82, Issue -, Pages 333-342Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2017.07.011
Keywords
Squid; Cuttlefish; Octopus; Processed seafood; Molecular species characterization
Categories
Funding
- National Natural Science Foundation of China [31201999]
- Natural Science Foundation of Guangdong Province [2014A030307022]
- Special Support Program of Guangdong Province [2014TQ01N621]
- Foundation for Distinguished Young Teachers in Higher Education of Guangdong [Yq2014115]
- Foundation of Education Bureau of Guangdong Province [2014KTSCX159]
- Technology Program of Guangdong Province [2016A040502078, 2015A030302089]
- Lingnan Normal University
- Technology Program of Zhanjiang [2015A03017, 2014A03011]
- Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, Qinzhou University [2017KB05]
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Squids, cuttlefish and octopus are used for the preparation of traditional products sold on the Chinese market without a specific denomination. In this study DNA barcoding and phylogenetic distance analysis of COI and 16S rRNA genes' fragments were used to characterize the most commonly processed species in dried whole, grilled shredded and salted cephalopod preparations. Ninety-five products (23 sold as cuttlefish, 4 as octopus and 68 as squid) purchased in Chinese local markets were analyzed. Overall, the study identified 10 different species: Sepia pharaonis, S. esculenta, S. recurvirostra, S. lycidas in cuttlefish; Amphioctopus marginatus in octopus; Uroteuthis chinensis, U. edulis, Ommastrephes bartramii, Illex argentinus and Dosidicus gigas in squids. This latter species, characterized by a low commercial value, was found in the majority of the samples (50.5%) and in all the shredded products. By comparing the molecular results with the declared macrocategory (cuttlefish, octopus and squid), two cases of misdescription were pointed out, involving shredded cuttlefish and octopus which were identified as D. gigas. Our results are of particular interest in the light of the scarcity of data regarding the identification of cephalopods on international markets and considering that China is one of the leading cephalopod producing countries. (C) 2017 Elsevier Ltd. All rights reserved.
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